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November 9, 1970

Horizontal Dislocation of The Patella

JAMA. 1970;214(6):1119. doi:10.1001/jama.1970.03180060093023

To the Editor.—  Horizontal dislocation of the patella is an uncommon injury, but recently sporadic reports have appeared in the literature, and in these reports recommendations for immediate open reduction have been made.1,2 The case reported did not require open reduction.

Report of a Case.—  On Aug 16, 1964, an 11-year-old Negro boy injured his right knee while running up stairs. He struck his knee on a railing, pain was severe, and he was unable to walk. When the patient arrived at the Milwaukee County General Hospital, the knee joint was swollen and an obvious deformity in the area of the patella was present. X-ray films showed a horizontal dislocation of the patella with interarticular surface facing distally. In the operating room with the patient under a general anesthetic, closed reduction was easily accomplished by gentle pressure over the inferior pole of the patella and simultaneous extension of the